Anyone know what these bone indentations are? (Photo)

I had forehead reduction surgery about 4 months ago. About 3 months in, I started to develop bone indentations that are very pronounced. It's definitely bone, not soft tissue swelling around. I've been to my surgeon about it several times and she's very confused and says she's never seen it happen. Does anyone know what it might be and anything I can do? It's quite embarrassing.